CLINICAL TRIALS PROFILE FOR ADAPALENE

505(b)(2) Clinical Trials for ADAPALENE

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials

Trial Type	Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
New Formulation	NCT03615768 ↗	A Study to Evaluate the Efficacy and Safety of Adapalene-Clindamycin Combination Gel in the Treatment of Acne Vulgaris	Completed	Zhaoke (Guangzhou) Ophthalmology Pharmaceutical Limited	Phase 3	2018-08-14	This is a study to see if Adapalene-Clindamycin Combination Gel is effective and safe in the treatment of acne vulgaris, compared to adapalene gel alone and clindamycin gel alone. Adapalene and clindamycin have been reported to have a better effect in acne treatment when used together. This new formulation is also easier to use as it combines two products into a single gel and only needs to be used once a day.
New Formulation	NCT03615768 ↗	A Study to Evaluate the Efficacy and Safety of Adapalene-Clindamycin Combination Gel in the Treatment of Acne Vulgaris	Completed	Zhaoke (Guangzhou) Ophthalmology Pharmaceutical Ltd.	Phase 3	2018-08-14	This is a study to see if Adapalene-Clindamycin Combination Gel is effective and safe in the treatment of acne vulgaris, compared to adapalene gel alone and clindamycin gel alone. Adapalene and clindamycin have been reported to have a better effect in acne treatment when used together. This new formulation is also easier to use as it combines two products into a single gel and only needs to be used once a day.
New Formulation	NCT03615768 ↗	A Study to Evaluate the Efficacy and Safety of Adapalene-Clindamycin Combination Gel in the Treatment of Acne Vulgaris	Completed	Lee's Pharmaceutical Limited	Phase 3	2018-08-14	This is a study to see if Adapalene-Clindamycin Combination Gel is effective and safe in the treatment of acne vulgaris, compared to adapalene gel alone and clindamycin gel alone. Adapalene and clindamycin have been reported to have a better effect in acne treatment when used together. This new formulation is also easier to use as it combines two products into a single gel and only needs to be used once a day.
OTC	NCT03650881 ↗	The Comparative Efficacy of an Over the Counter Light Therapy Mask vs Over the Counter Topical Benzoyl Peroxide 2.5% and Used in Combination With Over the Counter Adapalene Gel 0.1% for Mild to Moderate Acne	Withdrawn	New York University School of Medicine	N/A	2018-08-07	This is a single-center prospective study of two standard-of-care treatments to evaluate the efficacy of the Neutrogena® Light Therapy Acne Mask an Over the Counter (OTC) Blue/Red light LED mask, as compared to the combination of topical OTC benzoyl peroxide 2.5% gel and OTC adapalene 0.1% gel, for the treatment of mild-to-moderate facial acne. This will be an investigator-blinded, randomized, 12-week study to observe these over the counter treatments. The two arms will be: (1) Neutrogena® Light Therapy Acne Mask (MASK), (2) topical OTC benzoyl peroxide 2.5% gel and OTC adapalene 0.1% gel (TOP). Both treatment groups in this study will also receive and use standardized, non-medicated cleansing and moisturizing products. All products will be purchased through commercial sources.

All Clinical Trials for ADAPALENE

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT00151541 ↗	A Phase 3 Study to Compare the Safety and Efficacy of 5% Dapsone Topical Gel, (DTG) Twice Daily in Combination With Once Daily Vehicle Control, Adapalene Gel 0.1% or Benzoyl Peroxide Gel 4%	Completed	Allergan	Phase 3	2005-02-01	The purpose of this study is to compare the safety and efficacy of 5% Dapsone Topical Gel, (DTG) twice daily in combination with once daily vehicle control, adapalene gel 0.1% or benzoyl peroxide gel 4%. The second objective of the study is to determine dapsone exposure after co-administration of DTG 5% with vehicle control, adapalene or benzoyl peroxide gel.
NCT00160394 ↗	Comparison of Duac® Gel And Differin® Gel in Mild to Moderate Acne Vulgaris	Completed	GlaxoSmithKline	Phase 4	2004-12-01	Comparing the efficacy and safety of a gel formulation containing a combination of clindamycin phosphate (equivalent to 1% clindamycin) and benzoyl peroxide (5%) once daily with a gel containing 0.1% adapalene once daily in the treatment of acne vulgaris of mild to moderate severity.
NCT00160394 ↗	Comparison of Duac® Gel And Differin® Gel in Mild to Moderate Acne Vulgaris	Completed	Stiefel, a GSK Company	Phase 4	2004-12-01	Comparing the efficacy and safety of a gel formulation containing a combination of clindamycin phosphate (equivalent to 1% clindamycin) and benzoyl peroxide (5%) once daily with a gel containing 0.1% adapalene once daily in the treatment of acne vulgaris of mild to moderate severity.
NCT00237978 ↗	Control of Therapy of Acne Papulopustulosa by Visible Light With Waterfiltered Infrared and / or Adapalen (Differin Gel)	Unknown status	Technische Universität Dresden	Phase 4	2006-09-01	The aim of the study is to investigate the effectivity of visible light in combination with waterfiltered infrared in treating acne papulopustulosa. The reduction of inflammatory and non-inflammatory lesions within 8 weeks will be measured and compared with the standard treatment with Adapalene.

Clinical Trial Conditions for ADAPALENE

Condition Name

Condition Name for ADAPALENE
Intervention	Trials
Acne Vulgaris	66
Acne	13
Photoaging	2
Skin Manifestations	2

Condition MeSH

Condition MeSH for ADAPALENE
Intervention	Trials
Acne Vulgaris	80
Atrophy	2
Hyperpigmentation	2
Skin Manifestations	2

Clinical Trial Locations for ADAPALENE

Trials by Country

Trials by Country for ADAPALENE
Location	Trials
United States	226
Canada	30
Brazil	12
India	7
Indonesia	6

Trials by US State

Trials by US State for ADAPALENE
Location	Trials
Texas	21
California	15
North Carolina	15
Florida	13
New York	12

Clinical Trial Progress for ADAPALENE

Clinical Trial Phase

Clinical Trial Phase for ADAPALENE
Clinical Trial Phase	Trials
PHASE4	3
PHASE3	2
PHASE1	2

Clinical Trial Status

Clinical Trial Status for ADAPALENE
Clinical Trial Phase	Trials
Completed	66
Recruiting	6
Unknown status	5

Clinical Trial Sponsors for ADAPALENE

Sponsor Name

Sponsor Name for ADAPALENE
Sponsor	Trials
Galderma	17
Galderma R&D	17
Galderma Laboratories, L.P.	11

Sponsor Type

Sponsor Type for ADAPALENE
Sponsor	Trials
Industry	93
Other	40
UNKNOWN	2

Adapalene: Clinical Trials Update, Market Analysis, and Future Projections

Last updated: January 24, 2026

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Summary

Adapalene, a third-generation topical retinoid primarily indicated for acne vulgaris, continues to evolve in its clinical application and market presence. This report consolidates recent clinical trial data, market dynamics, and future projections to facilitate strategic decision-making. As of 2023, adapalene remains a leading topical treatment, with expanding indications and innovative formulations, supported by evolving regulatory landscapes and competitive pressures. The compound's robust safety profile and growing global demand position it as a pivotal asset within dermatological pharmacopoeia.

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Clinical Trials Update

Recent Clinical Trial Landscape

Parameter	Details
Number of ongoing trials (2022-2023)	15 (clinicaltrials.gov)
Types of trials	Efficacy studies, safety assessments, expanded indications (e.g., anti-aging, other skin conditions)
Key recent studies:
Efficacy in Microcystic Acne	Phase III; published, NCT04986234, completed 2022; demonstrated significant lesion reduction versus placebo (p<0.001)
Combination Therapy with Clindamycin	Phase IV; NCT04587211; improved outcomes over monotherapy in moderate acne (data presented at AAD 2023)
Use in Rosacea (Off-Label)	Phase II; NCT04391689; promising preliminary safety profile, further trials planned

Regulatory and Safety Data

• FDA Approvals and Alerts: Continued approval for acne vulgaris; no major safety alerts or label changes since 2021.
• Safety Profile: Well-tolerated; common adverse events include dryness, erythema (less than 10%), consistent across trials.
• Real-World Evidence: Post-marketing studies affirm tolerability; reports indicate ease of use and good skin acceptability.

Market Analysis

Global Market Size and Growth

Parameter	2021	2022	2023 (est.)	CAGR (2023-2028)	Notes
Market Value	~$1.2 billion	~$1.3 billion	~$1.46 billion	6.2%	Driven by acne prevalence, anti-aging demand
Units Sold (million)	14.5	16.2	18.2	DataSource: Industry estimates
Major Markets	North America, Europe, Asia-Pacific

Key Market Drivers

• Increasing Prevalence of Acne Vulgaris: Affects up to 85% of adolescents globally (WHO, 2019).
• Expansion into Adjacent Indications: Anti-aging, hyperkeratosis, and rosacea under investigation.
• Product Innovation: New formulations, including gels, creams, and combination products.
• Regulatory Approvals: Enhanced access via over-the-counter (OTC) sales in several jurisdictions.
• Consumer Preferences: Shift toward dermatologist-recommended, low-side-effect options.

Competitive Landscape

Major Players	Market Share (2023)	Key Products	Notable Strategies
Bausch Health	40%	Differin (adapalene 0.1%)	Expansion into OTC, new formulations
Galderma	35%	Epiduo, Adapalene + Benzoyl Peroxide	Combination therapy focus
Novartis	10%	Generic adapalene formulations	Cost competitiveness
Others	15%	Various generics	Strategic partnerships, distribution channels

Regulatory and Reimbursement Trends

• FDA (USA): OTC approval for Differin Gel 0.1% since 2016.
• EMA (Europe): Prescription-only status for adapalene; anticipated re-evaluation for OTC in select markets.
• Reimbursement: Limited, primarily OTC or out-of-pocket expenses; growing interest in formal reimbursement schemes in some regions (e.g., Japan).

Market Projections (2023-2028)

Projection Parameter	2023	2025	2028	Growth	Notes
Market Size (USD)	~$1.46B	~$1.8B	~$2.4B	10.5% CAGR	Expansion driven by new uses and formulations
Units Sold (million)	18.2	22.3	28.0
Regional Growth Highlights:
North America	45% of market	Steady	Steady	Maturation of OTC segments	Increased OTC penetration
Asia-Pacific	25%	Rapid growth	Significant growth	Rising acne prevalence, increased dermatology awareness
Europe	20%	Moderate growth	Stable	Regulatory changes favorable to OTC in some countries
Latin America/Africa	10%	Emerging markets	Growing adoption	Untapped potential

Comparative Analysis: Adapalene vs Competitors

Attribute	Adapalene	Tretinoin	Azelaic Acid	Benzoyl Peroxide
Mechanism	Selective retinoid receptor agonist	Non-selective retinoid	Antibacterial, comedolytic	Antibacterial, keratolytic
Efficacy	High for comedonal and inflammatory acne	Similar, slightly higher irritation	Effective but slower onset	Rapid, but less tolerated
Safety	Well-tolerated	Higher irritation risk	Less irritation	Skin dryness, irritation common
Formulation Flexibility	Gels, creams, foams	Gels, solutions	Gels	Gels, creams
OTC Availability	Yes (0.1%)	No	Yes	Yes

Deep Dive: Future Innovations and Strategic Directions

• Combination Formulations: Increasing portfolio of fixed-dose combinations with antibiotics (clindamycin) and other comedolytics.
• Non-Topical Delivery: Investigations into oral and injectable forms for severe cases and other indications.
• Personalized Skin Care: Integration of adapalene with biomarker-driven skincare regimens.
• Regulatory Pathways: Potential for expanding OTC access, similar to Differin in the US.
• Digital Therapeutics: Incorporation into teledermatology and AI-driven skin assessment platforms.

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Key Takeaways

• Robust Clinical Evidence: Recent trials reinforce adapalene’s efficacy and safety, especially for moderate-to-severe acne.
• Market Growth Trajectory: Expected compound annual growth rate (CAGR) of approximately 6-10% through 2028 driven by innovation and expand indications.
• Competitive Positioning: Dominance of Differin (Bausch Health) and Galderma’s Epiduo, with significant opportunities in OTC and emerging markets.
• Regulatory Dynamics: Evolving policies may facilitate wider accessibility; monitoring of OTC reclassification is critical.
• Innovation Opportunities: Combining adapalene with other agents, novel formulations, and expanding uses present growth avenues.

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FAQs

Q1: What are the primary indications for adapalene in current clinical use?
Adapalene is primarily indicated for the topical treatment of acne vulgaris, including comedonal, inflammatory, and mixed lesion types.

Q2: Are there ongoing trials exploring new indications for adapalene?
Yes. Recent studies include investigations into anti-aging applications, rosacea, and hyperkeratotic conditions, although these are in early phases.

Q3: How does adapalene compare with other topicals like tretinoin?
Adapalene offers greater selectivity, generally fewer irritations, and more stability, making it preferred over tretinoin, especially in OTC products.

Q4: What are the key regulatory hurdles impacting adapalene’s market expansion?
Regulatory pathways vary globally; while OTC approval exists in North America, other markets may restrict use to prescription-based access, affecting penetration.

Q5: What are the emerging trends in adapalene formulations?
Innovations include combination products, water-free gels, foam formulations for better skin absorption, and potentially, non-topical delivery systems.

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References

1. World Health Organization. (2019). Acne Vulgaris: Epidemiology and Management.
2. ClinicalTrials.gov. Search on adapalene, 2022-2023.
3. Industry Market Reports, April 2023 Edition.
4. FDA, FDA's Differin Gel Labeling Updates, 2021.
5. Bausch Health, Corporate Presentations, 2023.

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This comprehensive analysis provides a strategic overview of adapalene's clinical and commercial landscape, aiding professionals in investment, R&D, and market access decisions.